| -- CXA8001.A |
| -- |
| -- Grant of Unlimited Rights |
| -- |
| -- Under contracts F33600-87-D-0337, F33600-84-D-0280, MDA903-79-C-0687, |
| -- F08630-91-C-0015, and DCA100-97-D-0025, the U.S. Government obtained |
| -- unlimited rights in the software and documentation contained herein. |
| -- Unlimited rights are defined in DFAR 252.227-7013(a)(19). By making |
| -- this public release, the Government intends to confer upon all |
| -- recipients unlimited rights equal to those held by the Government. |
| -- These rights include rights to use, duplicate, release or disclose the |
| -- released technical data and computer software in whole or in part, in |
| -- any manner and for any purpose whatsoever, and to have or permit others |
| -- to do so. |
| -- |
| -- DISCLAIMER |
| -- |
| -- ALL MATERIALS OR INFORMATION HEREIN RELEASED, MADE AVAILABLE OR |
| -- DISCLOSED ARE AS IS. THE GOVERNMENT MAKES NO EXPRESS OR IMPLIED |
| -- WARRANTY AS TO ANY MATTER WHATSOEVER, INCLUDING THE CONDITIONS OF THE |
| -- SOFTWARE, DOCUMENTATION OR OTHER INFORMATION RELEASED, MADE AVAILABLE |
| -- OR DISCLOSED, OR THE OWNERSHIP, MERCHANTABILITY, OR FITNESS FOR A |
| -- PARTICULAR PURPOSE OF SAID MATERIAL. |
| --* |
| -- |
| -- OBJECTIVE: |
| -- Check that all elements to be transferred to a sequential file of |
| -- mode Append_File will be placed following the last element currently |
| -- in the file. |
| -- Check that it is possible to append data to a file that has been |
| -- previously appended to. |
| -- Check that the predefined procedure Write will place an element after |
| -- the last element in the file in mode Append_File. |
| -- |
| -- TEST DESCRIPTION: |
| -- This test implements a sequential file system that has the capability |
| -- to store data records at the end of a file. Initially, the file is |
| -- opened with mode Out_File, and data is written to the file. The file |
| -- is closed, then reopened with mode Append_File. An additional record |
| -- is written, and again the file is closed. The file is then reopened, |
| -- again with mode Append_File, and another record is written to the |
| -- file. |
| -- The file is closed again, the reopened with mode In_File, and the data |
| -- in the file is read and checked for proper ordering within the file. |
| -- |
| -- An expected common usage of Append_File mode would be in the opening |
| -- of a file that currently contains data. Likewise, the reopening of |
| -- files in Append_Mode that have been previously appended to for the |
| -- addition of more data would be frequently encountered. This test |
| -- attempts to simulate both situations. (Of course, in an actual user |
| -- environment, the open/write/close processing would be performed using |
| -- looping structures, rather than the straight-line processing displayed |
| -- here.) |
| -- |
| -- APPLICABILITY CRITERIA: |
| -- Applicable to all systems capable of supporting IO operations on |
| -- external Sequential_IO files. |
| -- |
| -- |
| -- CHANGE HISTORY: |
| -- 06 Dec 94 SAIC ACVC 2.0 |
| -- 27 Feb 97 PWB.CTA Allowed for non-support of some IO operations |
| --! |
| |
| with Sequential_IO; |
| with Report; |
| |
| procedure CXA8001 is |
| |
| -- Declare data types and objects to be stored in the file. |
| subtype Name_Type is String (1 .. 10); |
| type Tickets is range 0 .. 1000; |
| |
| type Order_Type is record |
| Name : Name_Type; |
| No_of_Tickets : Tickets; |
| end record; |
| |
| package Order_IO is new Sequential_IO (Order_Type); -- Declare Seq_IO |
| -- package, |
| Order_File : Order_IO.File_Type; -- and file object. |
| Order_Filename : constant String := |
| Report.Legal_File_Name ( Nam => "CXA8001" ); |
| Incomplete : exception; |
| |
| begin |
| |
| Report.Test ("CXA8001", "Check that all elements to be transferred to a " & |
| "sequential file of mode Append_File will be " & |
| "placed following the last element currently " & |
| "in the file"); |
| |
| Test_for_Sequential_IO_Support: |
| begin |
| |
| -- An implementation that does not support Sequential_IO in a particular |
| -- environment will raise Use_Error or Name_Error on calls to various |
| -- Sequential_IO operations. This block statement encloses a call to |
| -- Create, which should produce an exception in a non-supportive |
| -- environment. These exceptions will be handled to produce a |
| -- Not_Applicable result. |
| |
| Order_IO.Create (File => Order_File, -- Create Sequential_IO file |
| Mode => Order_IO.Out_File, -- with mode Out_File. |
| Name => Order_Filename); |
| |
| exception |
| |
| when Order_IO.Use_Error | Order_IO.Name_Error => |
| Report.Not_Applicable |
| ( "Files not supported - Create as Out_File for Sequential_IO" ); |
| raise Incomplete; |
| |
| end Test_for_Sequential_IO_Support; |
| |
| Operational_Test_Block: |
| declare |
| -- Assign values into the component fields of the data objects. |
| Buyer_1 : constant Order_Type := ("John Smith", 3); |
| Buyer_2 : constant Order_Type := |
| (Name => "Jane Jones", No_of_Tickets => 2); |
| Buyer_3 : Order_Type := ("Mike Brown", 5); |
| |
| begin |
| Order_IO.Write (File => Order_File, -- Write initial data item |
| Item => Buyer_1); -- to file. |
| |
| Order_IO.Close (File => Order_File); -- Close file. |
| |
| -- |
| -- Enter additional data records into the file. (Append to a file of |
| -- previous mode Out_File). |
| -- |
| Order_IO.Open (Order_File, -- Open Sequential_IO file |
| Order_IO.Append_File, -- with mode Append_File. |
| Order_Filename); |
| |
| Order_IO.Write (Order_File, Buyer_2); -- Write second data item |
| -- to file. |
| Order_IO.Close (File => Order_File); -- Close file. |
| |
| -- Check to determine whether file is actually closed. |
| begin |
| Order_IO.Write (Order_File, Buyer_2); |
| Report.Failed("Exception not raised on Write to Closed file"); |
| exception |
| when Order_IO.Status_Error => null; -- Expected exception. |
| when others => |
| Report.Failed("Incorrect exception on Write to Closed file"); |
| end; |
| |
| -- |
| -- The following code segment demonstrates appending data to a file |
| -- that has been previously appended to. |
| -- |
| |
| Order_IO.Open (Order_File, -- Open Sequential_IO file |
| Order_IO.Append_File, -- with mode Append_File. |
| Order_Filename ); |
| |
| Order_IO.Write (Order_File, Buyer_3); -- Write third data item |
| -- to file. |
| Order_IO.Close (File => Order_File); -- Close file. |
| |
| |
| Test_Verification_Block: |
| declare |
| TC_Order1, TC_Order2, TC_Order3 : Order_Type; |
| begin |
| |
| Order_IO.Open (Order_File, -- Open Sequential_IO file |
| Order_IO.In_File, -- with mode In_File. |
| Order_Filename ); |
| |
| Order_IO.Read (File => Order_File, -- Read records from file. |
| Item => TC_Order1); |
| Order_IO.Read (Order_File, TC_Order2); |
| Order_IO.Read (Order_File, TC_Order3); |
| |
| -- Compare the contents of each with the individual data items. |
| -- If items read from file do not match the items placed into |
| -- the file, in the appropriate order, then fail. |
| |
| if ((TC_Order1 /= Buyer_1) or |
| (TC_Order2.Name /= Buyer_2.Name) or |
| (TC_Order2.No_of_Tickets /= Buyer_2.No_of_Tickets) or |
| not ((TC_Order3.Name = "Mike Brown") and |
| (TC_Order3.No_of_Tickets = 5))) then |
| Report.Failed ("Incorrect appending of record data in file"); |
| end if; |
| |
| -- Check to determine that no more than three data records were |
| -- actually written to the file. |
| if not Order_IO.End_Of_File (Order_File) then |
| Report.Failed("File not empty after three reads"); |
| end if; |
| |
| exception |
| |
| when Order_IO.End_Error => -- If three items not in |
| -- file (data overwritten), |
| -- then fail. |
| Report.Failed ("Incorrect number of record elements in file"); |
| |
| when others => |
| Report.Failed ("Error raised during data verification"); |
| |
| end Test_Verification_Block; |
| |
| exception |
| |
| when others => |
| Report.Failed("Exception raised during Sequential_IO processing"); |
| |
| end Operational_Test_Block; |
| |
| Deletion: |
| begin |
| -- Check that file is open prior to deleting it. |
| if Order_IO.Is_Open(Order_File) then |
| Order_IO.Delete (Order_File); |
| else |
| Order_IO.Open(Order_File, Order_IO.In_File, Order_Filename); |
| Order_IO.Delete (Order_File); |
| end if; |
| |
| exception |
| when others => |
| Report.Failed |
| ( "Delete not properly implemented for Sequential_IO" ); |
| |
| end Deletion; |
| |
| Report.Result; |
| |
| exception |
| when Incomplete => |
| Report.Result; |
| when others => |
| Report.Failed ( "Unexpected exception" ); |
| Report.Result; |
| |
| end CXA8001; |
